Tension-spool



J. R. EVANS AND F. H. G. BRANDT.

ISIS- RENEWED SEPT 19' I9I9.

. Patented Mar. 9, 1920.

ll TNESS J. R. EVANS AND F. H. G. BRANDT.

. TENSION SPOOL. APPLICATION FILED NOV- 25.1916. RENEWED SEPT. 19, 1 919.

1,333,069. v Patented Mar. 9,1920.

2 SHEETS-SHEET 2.

WITNESS (47 T NE) -Uiarrnn sra'rus PATENT om n JOHN R. EVANS Aim 'roimo H. anaemia, censuses CITY, KANSAS, ASSIGNORS, BY

MESNE assremunnrs, 'ro Kansas CITY AUTOMATIC rraY PRESS COMPANY.

TENSION-SPOOL.

Specification of Letters Patent.

Patented- Mar. 9, 1920.-

Application filed Noveinher 25. 191s. Serial N01 133.826.: Renewed September 19, 19 19. Serialfbld. 3245991. I

To all whom it may concern: H

Be it known that .we, JOHN Evans and FOKKOH. G. BRANDT, citizens, respectively, of the United States and Germany, and siding at Kansas City, in the county of l/Vyandotte and State of Kansas, have in vented certain new and useful improvements in Tension-Spools, of which the following is a specification.

This invention relates to tension spools and more especially to a spool for paying out wire for tying bales ofhay and the like. The object is to produce a simple, strong, durable and compact tension spool which can be easily and quickly placed in or removed from position and whiclrwill not overrun in its unwinding operation. J

Another object is to produce a spool comprising a mounting, a spool member for holding wire twine or the like, and a more her for retainin the spool. in position on the mounting and for yieldingly resisting rotation of the spool in order to guard against overrunning action of the same.

Vtlith theobjects named in view. the invention consists in certain novel and peculiar features of construction 11% combinations of parts as hereinafter described and pointed out in the appended 01311118, it1'1d'111 order that it may be fully understood, reference is to'rberhad to the accompanyingdrawings in which,-

. Figure 1, is a side view of a tension spool embodying theinvention, shown as mounted at the side of a support, such as a baling p e -V so V Fig. 2,-..is a vertical section on the line IIT'II Of Fig. 1. V

Fig. 3. is a horizontal section taken on the line TIL-III of-Fig. 1. p I r Fig. 4:, is a vertical section taken on the irregular line-IV.IV of Fig. 3.

Fig. 5,'is a detailedtop view of apair of friction shoes constituting a part of the tension spool.

- Fig. 6,

support is a mounting constructed as fol.-

lows: 2 is a-perforated base through which socuring bolts will "be fitted to. secure the is a i detailed perspective View showing apart of the mounting for the.

mounting in position, and formed integral are provided with lugs 5 provided with tapped or threaded hole's'G andat one side the outer ends of the arms are connected by a vertical bridge piece 7.'

Sis'a circular head or disk of the same diameter as the cylindrical portion 3 of the mounting, and said head is secured rigidly against the outer face of the arms 4 by stud bolts 9 secured in the. tapped holes 6, and

nuts 10 engaging the outer ends of said bolts. The head or diskconstitutes in conjunction with the cylindrical portion 3,1119 mounting for a spool '11, which is shownas composed of a body portion 12 of wood and a metalflange 13, ant. said spool is formed with an internal-circular channel 14.

15 indicates a pair of segmental friction: shoes whose outer surfaces are struck from the same radius as the internal channel ofthe spool and said shoes are of width to fit snugly in said channel and thereby guard against the spool working off the mounting. Each shoe is provided with a pair of inwardly projecting arms 16, which respectively engage the parallel'inner faces of the guide arms 4. One of the shoes is also provided with a vertical wall 17 at the outer edges of its arms 16, and projecting beyond the inner'ends' of such arms. The other shoe is provided with a." forwardly Offset wall 18 to fit against the outer side of wall 17 and to provide a slot 19 for the reception of the projecting end 'of'wa ll 17. The overlappingiwalls 1.7 and 18 are provided with registering openings 19 and at oppo site sides or ends said openings communicate with small recesses 20 in said walls, the re' cesses being disposed in the same horizontal 1 plane but at opposite side'sof the axis of the spool and mounting and occupying said openings 19 s an elhptic cam 21 mounted or formed on the inner end of a shaft 22 zontal positionand viceversa, the said cam in turning applying pressure simultaneously .01 the walls 17 and l8 of'the shoesfor'the,

purpose of imparting endwise approaching movement, thereto and thereby withdrawing the shoes from the internal channel of the spool so that the latter may he slipped off the mounting, the spool being equipped with a pair of handles 2% for convenience in placing it on or removing it trom the mounting.

Tb eiiect'outward adjustment of the shoes into the internal channel of the spool and not only retain the latter from working off the mounting but restrain it from freedom of rotation or from overrunning, an eXpancured to the inner ends of a pair 01 screws 28 engaging threaded openings in the shoes 15,

' the'outer hereof the shoes being provided with cavities 29 receiving the outer ends of the screws to give convenient access with a tool to the screws regardless of the position of adjustment of the. latter.

When the spool member is to be reniioved,

the operator applies turning pressure on handle :23 and turns the same a one-fourth revolution. In accomplishing this purpose, the opposite ends of the elliptic cam apply pressure on the walls 17 and 18 of the shoes and thereby effect the retraction of the arouate portions or" the shoes from the position shown in Figs. 3 and e to'the position shown in dotted lines in the last-named figure, that is to say, he withdraws the shoes until their outer faces are flush with or slightly inward or" the circumference of the cylindrical portion 3 of the base and the head or disk. and the engagement of the ends of the elliptic cam with the recesses 20 in the walls 17 and 18 prevent the spring 25, compressedbythe inward adjustment of the shoes, from reversing such movement.- The operator is therefore free to slide the spool member oil" the mounting. I r

The spool can be replaced with one charged with wire, not shown, by simply slipping such spool upon the mounting. The operator then turns the handle to trip the elliptic camfr'om engagement with the recesses 20 and returns said cam toits original position, and as this occurs the spring reacts to force the shoes outward until they enter the internal channel of the specimensber. 'When thus engaged they not onlyretain the member in position, but offer a yielding resistance to rotation of such memher and thus guard against the-spool unwinding with suflicient rapidity to slacken the wire or twine being unwound. from it.

-From the above description it will be apparent that we have produced a tension spool possessing the features of advantage enumerated as desirable in the statement of inventlon, and we wish it to be underst od that while we have illustrated and described 7 the preferred embodiment of the invention,

ber rotatable thereon, a pair of friction shoes slidable on said support and provided with recesses, yielding meansholding said shoes clamped against the inner side of said spool member, and means to withdrawn the shoes trrnn engagement with the spool mem her. and engage said recesses to beheld then?- by against accidental movement.

2. A tension spool support, a spool member rotatable thereon, a pair of trietim shoes slidable on" said support, yielding means holding said'shoes clamped agains the inner side of said spool member, an elliptic cam carried. by the journal support, and means to turn said cam and cause it to apply pressure upon the friction shoes to withdraw the same from engagementwith said spool member; said frictionshoes having opposite recesses for respectively receiving the ends 01" the elliptic cam to prevent accidental rotative movement thereof and prevent the spring from moving the friction shoes outward;

3. A tension spool support,a spool member rotatable thereon and provided with an internal circular channel, a friction shoe slidable' on said journal support, a spring for imparting outward sliding moven'ient to of, and means to impart inward sliding movement to the shoe to overcome the resistance of said spring and withdraw the shoe from said channel of the spool. member.

i. A tension spool support, a spool member rotatable thereon and provided with an internal circular channel, a pair of friction shoes mounted slidingly on said support, an expansion spring arranged between and bearing outwardly on said shoes to cause the same to enter tle said channel of the spool nember to retain the same against lateral movement on its journal support andto yieldingly resist rotative movement ot said spool member, and means to impart simultaneous-inward movement to. said shoes to of said arms with its axis alined with the 7 member journaled on said cylindrical portion and head and provided with an internal circular channel, a pair of segmental friction shoes provided with inwardly projecting parallel arms engaging the parallel faces of said first-named arms, an expansion spring arranged between and applying outward pressure on the friction shoes to dispose them in the channel of sald spool memher and yieldingly against the latter, and means ournaled 1n the sand head for impartlng s multaneous inward movement to said shoes to withdraw the same from engage-- ment with the spool member and out of thesaid channel thereof; V r v 6. Atension spool support comprising a cylindrical portion, arms projecting outwardly therefrom and having parallel inner faces, a circular head secured against the outer ends of sald arms with its axis alined with the axis of the sald cylindrical vpoition, a. spool member journaled on said cylindrical portion and head and provided with an internal circular channel, a pair of segmental friction shoes provided with inwardly projecting parallel arms engaging the parallel faces of said first-named arms, and also provided with a pair of parallel overlapping walls having-registering openings, ashaft journaled in said head and pro-' vided with an elliptic cam within said openings and adapted when turned to simultaneously engage said walls an'dforce the shoes inward until withdrawn from the channel of said spool. l

'7. A tension spool support comprising a cylindrical portion, arms projecting out- "wardly therefrom and having parallel inner faces, a circular head secured against the outer ends of said arms w th its aXlS al ned with the axis of the sald cylindrlcal portion,

a spool member j ournaled on said cylindrical portion andhead and provided with an internal circular channel, a pair of segmental friction shoes provided with inwardly projecting parallel arms engaging the parallel faces of said first-named arms, and also pro-f vided with a pair of parallel overlapping vwalls having registering openings and horizontally alined recesses communicating with said openings, shaft journaled in said head and provided with an elliptic cam standing in said openings, and a handle to turn the shaft and cause the cam to respectively engage the said walls at opposite ends of said openings, and impart inward movement to the shoes until the ends of the cam respectively engage said recesses.

8, In a tension'spool support, a member comprising a cylindrical portion, arms projecting forwardly therefrom provided with parallel inner faces, a circular head secured to the front ends of said arms and "disposed concentrically with respect to said cylindri- Vca-li portion, a pair of segmental friction shoes fitting slidingly between said arms, an expansion spring for imparting outward sliding movement to said. shoes until their circumferential faces are disposed outward of the circumferential faces of said cylindrical portion and head, and means for imparting simultaneous inward movement to said shoes until their circumferential faces are substantially flush with the circumferential faces of said cylindrical portion and head.

In testimony whereof we aflix our signatures -in the presence oftwo witnesses. 

